PDF malware analysis — malicious · 95f312ae678cfeb8

MALICIOUS

PDF

83.4 KB Created: 2021-09-18 17:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 50ef7a3f608fd0cd18c6b0fc76f934e6 SHA-1: f7e9754896725910a7aef3ab4c4362eebe854b52 SHA-256: 95f312ae678cfeb82373fadcacfc2a89acbf2f00f05084899c062c3596174aa5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the nature of the links and the 'compromised CMS upload link farm' heuristic indicate a strong likelihood of malicious redirection or exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://chcial.ru/uplcv?utm_term=shakti+mohan+dance+plus+5 PDF link annotation
- http://barexkft.hu/userfiles/file/32334999624.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/55ee2a7520b2807ca155839427bbbd33/31411784091.pdfIn PDF document text
- http://minhphucvietnam.com/uploads/userfiles/file/zokememadaf.pdfIn PDF document text
- https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/76158532071.pdfIn PDF document text
- http://teamwork-poetschke.com/ckfinder/userfiles/files/4908778192.pdfIn PDF document text
- http://solar-makernavi.com/ckfinder/userfiles/files/49483336314.pdfIn PDF document text
- https://senesi-sklad.cz/userfiles/file/51190918726.pdfIn PDF document text
- http://becucci.it/userfiles/files/22812124306.pdfIn PDF document text
- http://srtprogetti.eu/userfiles/files/37091619356.pdfIn PDF document text
- https://gegeny.hu/uploads/file/witirizuloviladex.pdfIn PDF document text
- https://namphuctourist.com/userfiles/file/jijasuni.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138bf16e8e35---35647329316.pdfIn PDF document text
- https://byocamacho.com/ckfinder/userfiles/files/41845714557.pdfIn PDF document text
- http://9275522-travel.com/userfiles/file/gejibezizideviwofetorixe.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d60824398---67006572594.pdfIn PDF document text
- http://upnbkk.com/file_media/file_image/file/31325836358.pdfIn PDF document text
- https://www.ruchya.com.tw/upload/files/14954364524.pdfIn PDF document text
- https://rugsinc.in/UserFiles/files/3917149713.pdfIn PDF document text
- https://gulfsupremesa.com/ckfinder/userfiles/files/jegirodedorukavi.pdfIn PDF document text
- https://manorhair.com/uploads/files/202109102358435075.pdfIn PDF document text
- https://inprovitcentroamerica.com/ckfinder/userfiles/files/91594905964.pdfIn PDF document text
- https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/pajosutaviwudesijejoleg.pdfIn PDF document text
- http://akgwealthplanner.com/crm/files/gibibogibidokirigi.pdfIn PDF document text
- http://mopron.ru/upload/files/15655258804.pdfIn PDF document text
- http://vrakskodamnetice.cz/file/95769900282.pdfIn PDF document text
- https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/58812288661.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d9fc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD9FC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f20e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF20E	20188 bytes
SHA-256: `48ba119bfbd62dce437b952f7a8b21b623c5a8cbdf508950fb234828f6971376`
`font_02_sfnt_off000126b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126B5	11080 bytes
SHA-256: `38c098b431a6aa67825843944e623a30e7d3a95dca5db16a99594a4b8f011445`

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